Date: Sun, 21 Jul 2019 15:00:13 +0000 (UTC)
From: Karen Goh <karenworld@yahoo.com>
To: "David G. Johnston" <david.g.johnston@gmail.com>
Cc: pgsql-admin@lists.postgresql.org, Ron <ronljohnsonjr@gmail.com>
Message-ID: <905425626.2686338.1563721213121@mail.yahoo.com>
In-Reply-To: 
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References: <820008379.2579287.1563670685484@mail.yahoo.com>
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Subject: Re: How do I alter an existing column and add a foreign key which
 is a Primary key to a table?
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On Sunday, July 21, 2019, 10:55:13 PM GMT+8, David G. Johnston <david.g.joh=
nston@gmail.com> wrote:


On Sunday, July 21, 2019, Karen Goh <karenworld@yahoo.com> wrote:

 You can't Select s_tutor.zip_code from subject_tutor as zip_code belongs t=
o s_tutor table.

 Hence, I wrote my last message about my confusion.


You need to show your entire schema and the queries that are giving you tro=
uble if you want to get help that is less confusing. Though as I wrote befo=
re I think your immediate problem is that you don=E2=80=99t have a =E2=80=
=9Ctutor=E2=80=9D table on which to create the PK.

Is there a way for me to generate an entity table diagram vis pgAdmin4 or P=
SQL ?

David J.

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<div>                <br><br><br><br><br>On Sunday, July 21, 2019, 10:55:13=
 PM GMT+8, David G. Johnston &lt;david.g.johnston@gmail.com&gt; wrote:<br><=
br><br>On Sunday, July 21, 2019, Karen Goh &lt;karenworld@yahoo.com&gt; wro=
te:<br><br>    You can&#39;t Select s_tutor.zip_code from subject_tutor as =
zip_code belongs to s_tutor table.<br><br>    Hence, I wrote my last messag=
e about my confusion.<br><br><br><br>You need to show your entire schema an=
d the queries that are giving you trouble if you want to get help that is l=
ess confusing.  Though as I wrote before I think your immediate problem is =
that you don=E2=80=99t have a =E2=80=9Ctutor=E2=80=9D table on which to cre=
ate the PK.<br><br>Is there a way for me to generate an entity table diagra=
m vis pgAdmin4 or PSQL ?<br><br>David J.<br><br>            </div>         =
  =20
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